Dermatological Phototherapy and Photodiagnostic Methods, 2nd by Jean Krutmann, Herbert Hönigsmann, Craig A. Elmets

By Jean Krutmann, Herbert Hönigsmann, Craig A. Elmets

New advancements within the box of the generally used photodiagnostic and phototherapeutic tools support to always enhance the implications within the day-by-day guidance. Edited through across the world well known specialists, the recent variation bargains updated, complete and clinically proper info on each element of photodiagnostic and phototherapy. The e-book is based in following parts:Photochemotherapy in day-by-day perform, precise phototherapeutic modalities and photoprotection in day-by-day perform. as a result of the distinctive constitution this new version is much more reader-friendly and has a robust specialise in medical features. It contains: directions for the therapy choices of particular illnesses, sensible directions for phototherapy with information regarding easy ideas of photobiology, standardized try out protocols for photodermatoses and analysis for dermis tumors.

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Additional resources for Dermatological Phototherapy and Photodiagnostic Methods, 2nd edition

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In doing so, only the lamp life properties and not the methods of determining lamp life are compared. For some lamp types, the often-used switching cycles have great influence on lamp life. For example, a metal halide lamp, each time burning for 8 h, reaches a lamp life of 6,000 h. When a switching cycle of 1 h is applied, lifetime decreases to 1,200 h. On the other hand, incandescent lamps can be switched on and off without any influence on the lamp life. 15 Burning-in times and average rated lifetime of some lamp types Lamp type Burning-in time Lifetime GLS incandescent lamps 5 s 1,000 h Halogen lamps low voltage Tf = 3,000 K 20 s 3,000 h Tf = 3,200 K 15 s 200 h Tf = 3,500 K 10 s 25 h Halogen lamps high voltage 20 s 1,500–3,000 h Halogen lamps infrared coated 15 s 3,000 h Fluorescent lamps: Standard 5 min 10,000 h With amalgam 15 min 10,000 h Without electrodes 5 min 60,000 h With UV phosphors 5 min 300–1,000 h 15 min 10,000–15,000 h Mercury low pressure (HNS ) 10 min 6,000 h Mercury high pressure (HQL®) 15 min 15,000 h 15 min 6,000–8,000 h Compact fluorescent lamps ® Metal halide lamps (HQI , HMI ) ® ® ® Xenon lamps (XBO ) 10 s 400–1,200 h ULTRA-VITALUX ® 5 min 1,000 h 3 min 500 h ULTRAMED® 46 1 L.

The remainder of the energy is distributed among the UV-A and -B range (~20%), the visible (~20%), and some weak lines in the IR. Adhered to the internal surface of the bulb wall are fluorescent substances in a thickness of 20–30 µm, converting the short-wavelength UV lines into longer-wavelength UV or visible radiation. Almost every UV quantum is converted into a photon with longer wavelength. The energy content of the photons converted is, however, in accordance with the Einstein relation, lower than that of the exciting radiation.

Distinctive Features of UV Radiators In the case of all known natural and technical light sources, UV, visible, and IR radiation always occur together, even though the radiation intensities in the individual ranges may exhibit great differences, depending upon the type of lamp [1–4, 21]. Nevertheless, the classification—which is customary in technical language—into UV radiators, light sources, and IR radiators does make sense, for it gives initial indications as to the spectral center of the radiation or reveals the main field of application.

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